Oak Harbor City Of, WA
Lead detected, under the action levels
Latest 90th-percentile lead: 1.2 ppb (monitoring period 2022-2024). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
About Oak Harbor City Of
Oak Harbor City Of serves about 23,675 people through 8,886 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Island County, Washington. EPA system ID: WA5362650. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
Against the period ending 2021 (1.4 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Oak Harbor City Of is 2 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 1.2 ppb |
| 2021 | 1.4 ppb |
| 2018 | 1 ppb |
| 2016 | 2 ppb |
Against other Washington systems
Of the 2,218 Washington systems with a lead result, the median latest reading is 1 ppb; 18 are over 15 ppb right now and 62 have gone over at some point. Oak Harbor City Of's 1.2 ppb sits at the 55th percentile in Washington and the 59th nationally (higher means more lead).
Other water systems in Island County
232 other systems share Island County; 105 of them have a higher latest lead result than Oak Harbor City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Naval Air Station/Whidbey Island | 16,595 | 3.4 ppb |
| Coupeville Town Of | 4,142 | 3.5 ppb |
| Camano Water Association | 2,592 | 1 ppb |
| Clinton Water District | 1,980 | 9.8 ppb |
| Langley City Of | 1,416 | 1.9 ppb |
| Harbor Hills Community Water System | 1,373 | 3 ppb |
| Freeland Water And Sewer District | 1,264 | 0 (not detected) |
| W&B Waterworks 1 | 1,112 | 1.3 ppb |
| Camano Co-Op Water & Power Co | 1,071 | 9.5 ppb |
| Bayview Beach Water District | 1,035 | 1.5 ppb |
Next steps for Oak Harbor, WA
Test your own tap with a certified lab first-draw sample; Oak Harbor, WA may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Oak Harbor City Of whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. What a 90th-percentile result does and does not tell you: how to read a lead result. Systems that went over once often dip back under; here is what that means.